I saw the two UPW museum collections and went through their photos, hoping to find this funny little gadget, but no luck. I also left a comment on the blog of Daryle Lambert who wrote a blog post on UPW porcelains, hoping that he might have some insight. So far the blog comment hasn't been processed, but I'll keep checking on it. Maybe he's stumped by this one too, LOL!
UPW does look like it would be a really interesting porcelain to collect, and some pieces are very valuable but go unrecognized so there is the potential to score big with it too. That was what inspired me to grab this little un-ID'd thing-a-ma-bobber, since it was only $12 bucks and it seemed like a fun way to learn about this company and pick up an interesting kitchen gadget, plus have fun doing yet another "what is it?" with you guys. This mystery piece was actually mis-listed on Ebay as United Porcelain Works but I googled UPW found what it really was and ID'd it with the 1877 logo. I will definitely be keeping an eye out for other UPW pieces in the future. Always good to know this stuff.